Q 09) What Are Mutable And Immutable Objects ?

Mutable Objects : 

          

          When you have the reference to an object and if the reference of the object can be altered it is known as Mutable Object.

A Mutable object is a kind of object whose state can be modified after it is created.

Eg : String Buffer.

Immutable Objects : 

           When you have the reference to an object  and if the reference of that object if it cannot be altered it is known as Immutable Object.

An Immutable object is a kind of object whose state Cannot be modified after it is created.

          Eg: String, Byte, Character, Double, Float, Integer, Long,

                Short, and  Boolean are immutable classes in Java